Effect of <TEX>$Al_2O_3$</TEX> and <TEX>$Y_2O_3$</TEX> on Machining of Silicon itride

,; ,; ,; ,; ,; ,

J. Korean Ceram. Soc. > Volume 33(3); 1996 > Article

Journal of the Korean Ceramic Society 1996;33(3): 269.

알루미나와 이트리아가 질화규소의 가공성에 미치는 영향

이수완, 장태석¹, 엄호성²

선문대학교 재료공학과
¹금속공학과
²기계공학과

Effect of $Al_2O_3$ and $Y_2O_3$ on Machining of Silicon itride

ABSTRACT

The effect of sintering aids on the sinterability for silcion nitride has been studied by hundreds workers. However the effect of sintering aids on the machinability as the own trobles which is the major barrier for the field applications of the ceramic components has not been fully studied. in this study the contents of Al2O3 and Y2O3 in silicon nitride were varied from 0 to 8 wt% respectively. The physical and mechanical properties of the silcion nitride were measured. The optimal microstructure of silicon nitride balls with the excellent machinability by adding with various contents of sintering aids was studied by MGF(magnetic-fluid grinding)technique. An attempt to figure out how the mechanical properties influence the machinability of silicon-nitride ball was made.

Key words: Magnetic fluid grinding, Silicon nitride, Alumina, Yttria, Machinability